Home
Class 12
MATHS
Suppose 5% of men and 0.25% of women hav...

Suppose 5% of men and 0.25% of women have grey hair. A grey haired person is selected at random. What is the probability of this person being male? (Assume that these are equal number of males and females)

Text Solution

Verified by Experts

The correct Answer is:
`20/21`
Promotional Banner

Topper's Solved these Questions

  • PROBABILITY

    ARIHANT PUBLICATION|Exercise CHAPTER PRACTICE (SHORT ANSWER TYPE QUESTIONS)|34 Videos

  • MATRICES

    ARIHANT PUBLICATION|Exercise CHAPTER PRACTICE (Very Short Answer Type Questions) |56 Videos

  • QUESTION PAPER 2018

    ARIHANT PUBLICATION|Exercise SHORT ANSWER TYPE QUESTIONS (ANSWER ANY THREE QUESTIONS)|38 Videos

Similar Questions

Explore conceptually related problems

A school has six classes 1, 2, 3, 4, 5 and 6 classes 2, 3, 4, 5 and 6 each have the same number of students, but there are twice this number in class 1. If a student is selected at random from the school, What is the probability that he (she)will be in class 1

A school has six classes 1, 2, 3, 4, 5 and 6 classes 2, 3, 4, 5 and 6 each have the same number of students, but there are twice this number in class 1. If a student is selected at random from the school, What is the probability that he (she)will be in class 2

By examining the chest X-ray, the probability that TB is detected when a person is actually suffering is 0.99. The probability of an healthy person diagnosed to have TB is 0.001. In à certain city, 1 in 1000 people suffers from TB. A person is selected at random and is diagnosed to have TB. What is the probability that he actually has TB?

ARIHANT PUBLICATION-PROBABILITY-CHAPTER PRACTICE(LONG ANSWER TYPE QUESTIONS)
  1. Bag I contains 3 red and 4 black balls and bag II contains 5 red and 6...

    Text Solution

    |

  2. Three bags contains a number of red and white balls as follows. Bag I ...

    Text Solution

    |

  3. Three bags contains a number of red and white balls as follows. Bag I ...

    Text Solution

    |

  4. Suppose we have four boxes A, B,C,D containing coloured marbles as giv...

    Text Solution

    |

  5. Suppose we have four boxes A, B,C,D containing coloured marbles as giv...

    Text Solution

    |

  6. Suppose we have four boxes A, B,C,D containing coloured marbles as giv...

    Text Solution

    |

  7. A factory has two machines A and B. Past record shows that machine A p...

    Text Solution

    |

  8. In a bulb factory, machines A, B and C manufacture 60%, 30% and 10% bu...

    Text Solution

    |

  9. There are three coins. One is a two tailed coin (having tail on both f...

    Text Solution

    |

  10. Suppose 5% of men and 0.25% of women have grey hair. A grey haired per...

    Text Solution

    |

  11. A man is known to speak truth 3 out of 4 times. He throws a die and re...

    Text Solution

    |

  12. Let d(1), d(2) and d(3) be three mutually exclusive diseases. Let S ...

    Text Solution

    |

  13. A crime is committed by one of two suspects A and B initially, there i...

    Text Solution

    |

  14. A letter is known to have come either from LONDON or CLIFTON. On the e...

    Text Solution

    |

  15. A letter is known to have come either from LONDON or CLIFTON. On the e...

    Text Solution

    |

  16. A class has 15 students whose ages are 14, 17, 15, 14, 21, 17, 19, 20,...

    Text Solution

    |

  17. From a box containing 32 bulbs out of which 8 are defective 4 bulbs ar...

    Text Solution

    |